These early structures are "supermassive" -- perhaps millions of times the mass of our sun -- and most of the light around them doesn't make it out of their galaxies, Schawinski said.

CNN: Black holes abound in early universe

Researchers said that result doesn't rule out the possibility that short-wavelength light also could be an alerting stimulus in the afternoon.

WSJ: Skin Cancer, Driving and Men

"I don't want to be the guy who turns out the light in the genre-blending room, " he says.

WSJ: Seth Grahame-Smith: The Master of the Mash-Up

It lets light and color through, but you can't make out any detail.

FORBES: Magazine Article

He's wearing a ratty blue sweater with a light brown T-shirt over it and the collar of a shirt spilling out over the top of it all.

NPR: The Redemptive Power of Music, and Friendship

Whether it's just one t-shirt at a time, one light bulb at a time, one relabeled food out at a time, we'll begin to see a real cultural shift on the issue.

NPR: Taking a Practical Approach to 'Green' Living

Make no bones about it, Stephenson doesn't fancy himself a master game designer, but he set out to create a PC arena game that's light on story and character development, but laser-focused on accuracy.

ENGADGET: Insert Coin: 2012's top 10 crowd-funded projects